[59317] in North American Network Operators' Group
Re: Latency generator?
daemon@ATHENA.MIT.EDU (Kevin Oberman)
Wed Jun 25 13:01:56 2003
To: "Temkin, David" <temkin@sig.com>
Cc: "'nanog@merit.edu'" <nanog@merit.edu>
In-Reply-To: Message from "Temkin, David" <temkin@sig.com>
of "Wed, 25 Jun 2003 12:48:29 EDT." <F40C64B897E6D511A4C70002A540458A0C2F5561@msxbala1.server.susq.com>
Date: Wed, 25 Jun 2003 09:59:23 -0700
From: "Kevin Oberman" <oberman@es.net>
Errors-To: owner-nanog-outgoing@merit.edu
> From: "Temkin, David" <temkin@sig.com>
> Date: Wed, 25 Jun 2003 12:48:29 -0400
> Sender: owner-nanog@merit.edu
>
> Does anyone know of any free, cheap, or potentially rentable latency
> generators? Ideally I'd like something that just sits between two ethernet
> devices to induce layer 2/3 latency in traffic, but am open to any
> options...
dummynet(4)? It's a standard part of FreeBSD and may be in other BSDs.
It's very configurable to generate delays, congestion like behavior
and such.
NAME
dummynet - traffic shaper, bandwidth manager and delay emulator
DESCRIPTION
dummynet is a system facility that permits the control of traffic going
through the various network interfaces, by applying bandwidth and queue
size limitations, implementing different scheduling and queue management
policies, and emulating delays and losses.
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net Phone: +1 510 486-8634
